I am not going to say anything about the design because I am terrible at this xD.
first thing I notice is that you need a padding in the section “about me” as big as your navbar because if you click on "about me " you can not see the first two or three lines of the section.
same with porfolio.
too many placeholders on the porfolio, think about it, you won’t put everything there, just the bests projects.
the rest looks good to me.
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the link to the bootstrap library goes in settings - css not in the html.
you comment your code and that’s good practice.
seems to be pretty good for only one week and a half keep coding.
(I am not an expert yet, just my point of view)